A personal device providing internet connectivity (currently a hotspot, but further evolved) + multiple local devices using that connectivity. No need for SIM a

A personal device providing internet connectivity (currently a hotspot, but further evolved) + multiple local devices using that connectivity. No need for SIM and data subscription for tablet, laptop, voice comms, video comms etc. Essentially, what was envisioned by the original bluetooth PAN concept (but not necessarily implemented as BT). The aggregrated uplink is much more scalable for cellular providers, low power budget for locally connected devices means they last longer/are cheaper to make. You are one SIM (or eSIM) - great for surveillance...